Manufacturing method and manufacturing system for aerosol generating substrate

Abstract

A manufacturing method for an aerosol generating substrate, which method includes: extruding a mixed material at room temperature to form an extruded substrate, wherein the mixed material is a component of an aerosol generating substrate; and subjecting the extruded substrate to hot air drying. The mixed material is extruded at room temperature and has good fluidity. In addition, further provided is a manufacturing system for an aerosol generating substrate.

1 . A method for manufacturing an aerosol generating substrate, comprising:
 subjecting a material mixture to room temperature extrusion to form an extrusion substrate, wherein the material mixture is a component of the aerosol generation substrate; and   subjecting the extrusion substrate to hot air drying.   
     
     
         2 . The method according to  claim 1 , wherein an extrusion temperature for the room temperature extrusion is comprised between 35° C. and 70° C., or
 an extrusion pressure for the room temperature extrusion is comprised between 0.5 bar and 300 bar, or 
 a temperature for the hot air drying is comprised between 50° C. and 200° C.; or 
 a moisture content of the extrusion substrate after drying is comprised between 3% and 20%. 
 
     
     
         3 . The method according to  claim 1 , wherein an extrusion pressure for the room temperature extrusion is comprised between 20 bar and 80 bar; or
 a temperature for the hot air drying is comprised between 75° C. and 125° C.   
     
     
         4 . The method according to  claim 1 , wherein the extrusion substrate has airways extending through opposite two ends of the extrusion substrate in a longitudinal direction, and wherein a flow direction of hot air is parallel to the longitudinal direction of the extrusion substrate during the hot air drying. 
     
     
         5 . The method according to  claim 1 , wherein after subjecting the material mixture to the room temperature extrusion to form the extrusion substrate, the method comprises:
 slitting the extrusion substrate.   
     
     
         6 . The method according to  claim 1 , wherein before subjecting the extrusion substrate to the hot air drying, the method comprises:
 hardening the extrusion substrate.   
     
     
         7 . The method according to  claim 6 , wherein a hardness of the extrusion substrate after hardening is comprised between 1 HB and 200 HB,
 wherein hardening the extrusion substrate comprises hardening the extrusion substrate by cooling.   
     
     
         8 . The method according to  claim 1 , wherein the extrusion substrate is extruded in a horizontal direction; or,
 the extrusion substrate is extruded in a vertical direction relative to the horizontal direction; or,   the extrusion substrate is extruded in an inclined direction relative to the horizontal direction.   
     
     
         9 . The method according to  claim 1 , wherein the material mixture comprises, in parts by weight, 30 to 90 parts of plant raw materials, 1 to 15 parts of auxiliary raw materials, 5 to 30 parts of smoking agent raw materials, 1 to 10 parts of binder raw materials, and 1 to 15 parts of perfume raw materials. 
     
     
         10 . A system for manufacturing an aerosol generating substrate, comprising:
 an extrusion device configured for subjecting a material mixture to room temperature extrusion to form an extrusion substrate; and   a hot air drying device configured for subjecting the extrusion substrate to hot air drying.   
     
     
         11 . The system according to  claim 10 , wherein the hot air drying device comprises:
 a casing having a drying chamber;   a fan configured for driving air flow in the drying chamber to flow; and   a heating element arranged in the drying chamber, and configured for heating the air flow in the drying chamber.   
     
     
         12 . The system according to  claim 11 , wherein there are at least two heating elements, and wherein the at least two heating elements are spaced apart in an up-down direction, and the extrusion substrate is conveyed between the at least two heating elements. 
     
     
         13 . The system according to  claim 10 , wherein the extrusion substrate has airways extending through opposite two ends of the extrusion substrate in a longitudinal direction, the hot air drying device comprises a flow guide channel for guiding hot air, and the flow guide channel has an air outlet located on a side of the extrusion substrate in the longitudinal direction. 
     
     
         14 . The system according to  claim 10 , wherein the hot air drying device comprises a conveyor belt, a surface of the conveyor belt facing the extrusion substrate is formed with a plurality of grooves, each of the grooves is configured for receiving one corresponding extrusion substrate, and at least a portion of the extrusion substrate is positioned within a respective one of the grooves. 
     
     
         15 . The system according to  claim 11 , comprising: at least one of a microwave auxiliary device or an ultrasonic auxiliary device,
 wherein a microwave auxiliary device is located at least partially within the drying chamber, and configured for drying the extrusion substrate by emitting microwave radiation;   the ultrasonic auxiliary device is located at least partially within the drying chamber, and configured for drying the extrusion substrate by emitting ultrasonic radiation.   
     
     
         16 . The system according to  claim 10 , comprising a hardening device for hardening the extrusion substrate. 
     
     
         17 . The system according to  claim 16 , wherein the hardening device comprises a housing formed with an inlet, a cold chamber, and an outlet, wherein the inlet and the outlet communicate with the cold chamber, and the cold chamber is configured for cooling and hardening the extrusion substrate. 
     
     
         18 . The system according to  claim 17 , wherein the housing is formed with an injection opening in communication with the cold chamber to inject a refrigerant into the cold chamber. 
     
     
         19 . The system according to  claim 17 , wherein the housing comprises a conveyor belt, at least a portion of the conveyor belt is located within the cold chamber, the conveyor belt is configured to convey the extrusion substrate from the inlet to the outlet, a surface of the conveyor belt facing the extrusion substrate is formed with a plurality of guide grooves, each of the guide grooves is configured for receiving one extrusion substrate, and at least a portion of the extrusion substrate is located within a respective one of the guide grooves, and
 wherein the housing is formed with a refrigerant channel, the cold chamber is isolated from the refrigerant channel and located within the refrigerant channel, and the extrusion substrate is in contact with a wall surface of the cold chamber.   
     
     
         20 . The system according to  claim 19 , wherein the housing comprises an outer shell and an inner shell, and wherein the cold chamber is formed in the inner shell, the inner shell is located inside the outer shell, and the inner shell and the outer shell collectively define the refrigerant channel, and
 wherein a smoothness of the wall surface of the cold chamber is comprised between Ra 1.2 μm and Ra 0.08 μm.